SysAdmin Valley » isdn http://www.sysadminvalley.com I might as well write this stuff down so I remember it tomorrow Wed, 25 Jan 2012 15:06:43 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Cisco Router (801) ISP ISDN Config Example http://www.sysadminvalley.com/2010/03/23/cisco-router-801-isp-isdn-config-example/ http://www.sysadminvalley.com/2010/03/23/cisco-router-801-isp-isdn-config-example/#comments Tue, 23 Mar 2010 13:06:57 +0000 mshields http://www.sysadminvalley.com/?p=200 Here is an example ISDN config for a Cisco 801 router

version 12.0
!
no ip domain-lookup
isdn switch-type basic-net3
!
!
!
interface Ethernet0
ip address 172.16.1.1 255.255.255.0
no ip directed-broadcast
ip nat inside
!
interface BRI0
ip address negotiated
no ip directed-broadcast
ip nat outside
encapsulation ppp
dialer string (put ISDN phone number here)
dialer-group 1
isdn switch-type basic-net3
no cdp enable
ppp chap hostname (Put username here)
ppp chap password (Put password here)
!
router rip
network 172.16.0.0
!
ip nat translation timeout 180
ip nat inside source list 1 interface BRI0 overload
ip http server
ip classless
ip route 0.0.0.0 0.0.0.0 BRI0
!
access-list 1 permit 172.16.0.0 0.0.255.255
access-list 100 deny ip any host 172.16.255.255
access-list 100 permit ip any any
dialer-list 1 protocol ip list 100
alias exec u undebug all
!
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